Mechanics
Heat
Waves
Electricity
Radioactivity
100
For a given mass, its acceleration is proportional to the unbalanced force acting on it.
What does F = ma mean in words?
100
What is conduction?
Heat transfer in solids.
100
Name an example of a longitudinal wave.
A sound wave.
100
What is A.C. and D.C.
A.C. is Alternative current
D.C. is derect current
100
What are beta particles?
Fast moving electrons.
200
Force x perpendicular distance to the pivot
How could you calculate a moment?
200
As water is heated it becomes less dense and rises. Further away from the heat source it cools, becomes more dense and sinks.
What is a convection current?
200
A lens that is thicker in the middle and thinner at the edges.
What is a convex/converging lens?
200
What instrument is used for potential difference? What unit is measured?
voltmeter
unit = volts
200
What is released by a nucleus during beta decay?
A nucleus releases an electron and an anti-beta radiation.
300
Resultant force is 40 N
Direction is Forward
The effect of the force: the cyclist will accelerate going forward.
300
State the following temperatures
i) Water melting at standard atmospheric pressure (Celsius)
ii) Water boiling at standard atmospheric pressure (Celsius)
iii) Calculate the temperature of air in kelvin if it is 15 Co?
i) 0 degrees
ii) 100 degrees
iii) 273 + 15 = 288 K
300
It has shortest wavelength and highest frequency.
Where would you find gamma waves on the electromagnetic spectrum?
300
Calculate the resistance of a lamp
its voltage = 6.0 V
current = 0.53 A
V = I x R
R = V / I
6.0 V / 0.52 A = 11 ohms
300
They have the same number of protons but a different number of neutrons.
What are isotopes?
400
Which law states "if the forces on an object are balanced, if at rest it will remain at rest, or if in motion it will move at a constant speed in a straight line"?
Newton's first law.
400
In what three ways could you increase the rate of evaporation?
Reduce humidity, increase temperature, blow across the surface.
400
Describe refraction of light as it enters a glass block.
Light slows down as it enters a more dense medium and turns towards the normal.
400
What is the electrical power of the lamp when its connected to a 6.0 V power source with a current of 0.53 A. What is its unit?
P = I x V
P = 0.53A x 6.0 V
P = 3.2 W (unit is Watts)
400
answer c & d
c) 300 counts to 150 counts = 44 seconds
1/2 life = 44 sec.
d) In a lead container
500
Do only part (a)
i) The cyclist motion is contant.
ii) distace = area of a rectangle
t = 4 sec. v = 4.5 m/s
4 sec. x 4.5 m/s = 18 m
500
Use image in part b
Solve (i) and the rods are made of different metals. The rods have the same length and diameter. The ends of the rods in the flame are at the same temperature.
State how the demonstration shows which metal transfers thermal energy at the greatest rate.
i) conduction
ii) The wax that melts off first or the fasters will be the metal thats the best at conducting heat.
500
Solve part b
i) microwaves
ii) orbits the earth and remains in the same place
iii) sun light
iv) electrical current
500
only answer part (a)
i) gravity
ii) 1 month or 28 days
ii) v = d / t ; t = d/v
3.8 x108 / 3.0 x108
time = 1.3 seconds